Prototype to easily create uniform backend application

Please read the related documentation in the docs folder.

WARNING : this is a prototype, and not a final/stable bundle.

• code can be irrelevant
• code might not use properly Symfony2 or Doctrine components
• code might change with no notices.

TODO :

• use the admin class to register route information
• save filter criteria
• export list
• edit group field
• add inline editing (Invoice with InvoiceLine)